Which Soviet mathematician was interrogated by the KGB as a result of his or her work, Sergei Novikov or Bella Subbotovskaya?
Bella Abramovna Subbotovskaya
-1
Section::::Abstract.
Sergei Novikov (mathematician)
628515
-1
Section::::Abstract.
Bella Subbotovskaya
37006272
-1
Section::::Abstract.
Bella Subbotovskaya
37006272